Let's assume humans could just fly, no wings. Regarding infrastructure in cities (large and small), what would be different.

A couple of thoughts I had.

  • Roads would only be used for transporting goods. So there would be way less roads, and those that exist are purely for logistics.
  • Home security would be a nightmare. Anyone can land on your property, so we'd need some kind of non-lethal anti air home security.
  • Tall would be more common since we can just fly to the right level.

What other things be drastically different from today?

  • 3
    $\begingroup$ Possible duplicate of How would an avian city be different from ours? $\endgroup$ – Separatrix Jun 7 '18 at 13:02
  • $\begingroup$ Welcome to WorldBuilding HristoM! I edited you question a bit to make it sound less like you are looking for opinions, which is off-topic. Someone marked your question as a possible duplicate. Please have a look at the other question and see if that already answers your question. If not, please edit to mention what's different and if it answers your question please close this one as a duplicate of the other one so that future readers can find their answers more easily. If you have a moment please take the tour and visit the help center to learn more about the site. Have fun! $\endgroup$ – Secespitus Jun 7 '18 at 13:05
  • $\begingroup$ "Tall would be more common since we can just fly to the right level. " I think that's an interesting idea, I wonder what that means exactly. Many buildings are not that tall because it's cheaper and easier to build it like that and not because we lack the ability to get to the higher levels. You should consider checking that idea perhaps via an extra topic. I suspect that while it might be true to some degree, maybe not by so much. $\endgroup$ – Raditz_35 Jun 7 '18 at 13:20
  • $\begingroup$ Roads would be kept for accessibility's sake. $\endgroup$ – Real Subtle Jun 8 '18 at 13:41